Currently QR barcode can be displayed in report after generating it as an image with another control or third party tool.
The PNG file generated by the RadBarcode
control would be with resolution 96dpi and will be rendered with the same resolution in the PDF file. If the image is not sharp enough you can try using a user-defined function
to load the PNG and scale it before setting to a PictureBox.Value
in the report.
Let us know if you have any further questions.
Have you tried the new visualization options in Telerik Reporting Q2 2013? You can get them from your account.